code: def test_paired_paths_windows_no_subfolder():
      nb_file = "C:\\Users\\notebooks\\notebooks\\nb.ipynb"
      formats = "notebooks///ipynb,scripts///py"
      with mock.patch("os.path.sep", "\\"):
          assert (
              base_path(nb_file, "notebooks///ipynb")
              == "C:\\Users\\notebooks\\//nb"
          )
          paired_paths(nb_file, "notebooks///ipynb", formats)
  
imports: import os
  import unittest.mock
  import pytest
  import jupytext
  from jupytext.cli import jupytext
  from jupytext.compare import compare
  from jupytext.contentsmanager import TextFileContentsManager
  from jupytext.formats import long_form_multiple_formats, long_form_one_format, short_form_multiple_formats
  from jupytext.paired_paths import InconsistentPath, base_path, full_path, paired_paths
label_desc: Use image node_id 12 for calling a global function with example usage: test_paired_paths_windows_no_subfolder() without return types